. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. HIBERNATION AND DEVELOPMENT OF BOLL WEEVIL. 13 to a stalk the previous fall. During the present year (1904) but per cent survived hibernation on the plots counted. This figure is open to slight error, as upon this plantation there were possibly 20 acres of cotton about a mile away, which were planted much earlier than was most of the plantation. This early cotton was infested at the rate of 20 weevils to 100 stalks on May 31. It is evident that the weevils which hibei-nated on the plantation as a whole had co
. Bulletin. Insects; Insect pests; Entomology; Insects; Insect pests; Entomology. HIBERNATION AND DEVELOPMENT OF BOLL WEEVIL. 13 to a stalk the previous fall. During the present year (1904) but per cent survived hibernation on the plots counted. This figure is open to slight error, as upon this plantation there were possibly 20 acres of cotton about a mile away, which were planted much earlier than was most of the plantation. This early cotton was infested at the rate of 20 weevils to 100 stalks on May 31. It is evident that the weevils which hibei-nated on the plantation as a whole had concentrated on this early planting, but if the total number of weevils upon this early cotton had been distributed over the whole acreage there would have been not over 2i weevils per 100 stalks or per cent surviving hibernation at the most. Two per cent would probably be very nearly correct. At Victoria, Hunter and Hinds have shown that approximately 15 per vi cTotTa orvVr- COLi.£(lC0lini: Ctuc&E iwreuu. Fig. 3.—Rainfall and temperature records of College Station and Victoria, Tex., for 1902-3, compared with normals. cent of late-developed weevils survived the winter of 1902-3 in hiber- nation cages. The very careful records made by Mr. Teltschick by hand-picking the weevils during the spring (see p. 59 of that report) shows that this very closely approximates the number of weevils nor- mally surviving under field conditions in Lavaca County, but that dur- ing the last winter (1903-1) fully 30 per cent of the weevils, or twice as many as usual, hibernated successfully. In 1900 Professor Mally's records (1. c, p. 32) show that Mr. Kramer picked 2,000 weevils at Booth, Fort Bend County, or 13 to 100 stalks, which would give at least 13 per cent surviving the winter, in a latitude practically the same as that of Vienna. It will be seen, therefore, that whereas 15 per cent may be considered an average of the number surviving. Please note that these images are extracted f
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